142278637 has 2 divisors, whose sum is σ = 142278638. Its totient is φ = 142278636.

The previous prime is 142278607. The next prime is 142278641. The reversal of 142278637 is 736872241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141943396 + 335241 = 11914^2 + 579^2 .

It is a cyclic number.

It is not a de Polignac number, because 142278637 - 2⁷ = 142278509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142278637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142278607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71139318 + 71139319.

It is an arithmetic number, because the mean of its divisors is an integer number (71139319).

Almost surely, 2^142278637 is an apocalyptic number.

It is an amenable number.

142278637 is a deficient number, since it is larger than the sum of its proper divisors (1).

142278637 is an equidigital number, since it uses as much as digits as its factorization.

142278637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 40.

The square root of 142278637 is about 11928.0609069538. The cubic root of 142278637 is about 522.0513606535.

The spelling of 142278637 in words is "one hundred forty-two million, two hundred seventy-eight thousand, six hundred thirty-seven".